The thing with depression. Just when you think things are starting to feel better and improve, it comes back. The sinking feelings, the anxiety and the desire to disappear from the world. To not think, to not feel. The numbness is better than the constant anxiety and feeling that you'll never be good enough :(
When you lose interest in the things you love, when you no longer care about things or anything in general.
The tiredness and lethargy. :(